Launching a new TV network could cost Donald Trump $200 million — and take up to three years to get off the ground, cable industry sources told The Post on Monday.

While some poured cold water over the suggestion that it would happen, others agreed the formation of a Trump TV network — whether a traditional cable affair or an over-the-top streaming project — is a smart way to capitalize on the developer’s huge and avid following.

The idea of Trump (should he lose the presidential election on Nov. 8) forming a TV network swirled around media, financial and political circles on Monday after a report in the Financial Times said Jared Kushner — a key adviser and the husband of Ivanka Trump, the candidate’s older daughter — met with media banker pal Aryeh Bourkoff.

Kushner did not return calls for comment. Sources downplayed the importance of the meeting, saying it was a brief, informal chat between friends and not one that will lead anywhere.

A Trump Organization rep was not immediately available.

To be sure, a Trump TV venture would afford the Republican standard-bearer a way to continue to hit back at his legion of critics.

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Trump, while trailing in recent polls, is said to have a base of roughly 43 million voters.

Should he lose the election, Trump’s options would include returning to his company full time and giving up his 17-month political career — or finding an outlet to keep his followers engaged.

A TV network would certainly give him a national stage to voice his opinions. Plus, the Trump campaign has amassed millions of e-mail addresses it could use to promote such a venture, were it to happen.

“I think it’s a strong possibility” that Trump starts a TV network,” said one TV insider familiar with such projects.

The insider believes that such an effort, if it came to pass, would “most likely be an SVOD” for two reasons.

First, the person said, it would be hard for Trump to get advertisers.

Second, it would be too risky for an existing public media company to touch him, as shareholders and minority employees would protest, the insider noted.

Trump has a friendship with former Fox News boss Roger Ailes, who exited after sexual harassment claims surfaced.